Lamprophyllite

Overview

Na2(Sr,Ba)2Ti3(SiO4)4(OH,F)2
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	3.44 g/cc
Hardness - Mohs	Lamprophyllite - 2.5  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	yellow, brown
Streak	brownish white

Crystal Properties

Property	Value
Crystal structure	monoclinic - prismatic
Cleavage	good
Tenacity	brittle
Fracture	brittle
Luster	vitreous, pearly

Similar Minerals

Dana Number : 56.02.06c.04

Class: 56

Group: 56.02

Subgroup: 56.02.06c - seidozerite-lamprophyllite

Dana Number	Mineral Name	Formula
56.02.06c.01	barytoamprophyllite	Ba2Na3(Fe+3,Ti)3(Si2O7)2(O,OH,F)4
56.02.06c.04	lamprophyllite	Na2(Sr,Ba)2Ti3(SiO4)4(OH,F)2
56.02.06c.07	eveslogite	(Ca,K,Na,Sr,Ba)48[(Ti,Nb,Fe,Mn)12(OH)12Si48O144](F,OH,Cl)14
56.02.06c.08	nabalamprophyllite	Ba(Na,Ba){Na3Ti[Ti2O2Si4O14](OH,F)2}

Nickel-Strunz Number : 09.BE.25

Group : 09

Subgroup : BE

Nickel-Strunz Number	Mineral Name	Formula
09.BE.25	barytoamprophyllite	Ba2Na3(Fe+3,Ti)3(Si2O7)2(O,OH,F)4
09.BE.25	lamprophyllite	Na2(Sr,Ba)2Ti3(SiO4)4(OH,F)2
09.BE.25	nabalamprophyllite	Ba(Na,Ba){Na3Ti[Ti2O2Si4O14](OH,F)2}
09.BE.25	seidozerite	(Na,Ca)2(Zr,Ti,Mn)2Si2O7(O,F)2

Specimens

Localities

Uses